Author: Juan Leyva
MDL-61671 tool_mobile: Improve certificate checks
Support different curl implementations and skip last certificate checks in some cases.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b8c4c7694bda5faaea89db487d37bc546aba43f2
http://github.com/moodle/moodle/commit/b8c4c7694bda5faaea89db487d37bc546aba43f2
+ 3.11 en [invalidcertificatechainwarning,tool_mobile]
+ 3.11 en [selfsignedoruntrustedcertificatewarning,tool_mobile]